DSMOD.exe (Windows XP)

Modify active directory object.

Syntax
   DSMOD computer <Computer_DN> <options>
   DSMOD contact <ContactDN> <options>
   DSMOD group  <GroupDN>  <options>
   DSMOD ou     <OU_DN>    <organizational_unit_options>
   DSMOD server <ServerDN> <domain_controller_options>
   DSMOD user   <User_DN> <user_options>
   DSMOD quota  <QuotaDN> <quota_options> 
   DSMOD partition <PartitionDN> <partition_options>

Key
DN=Distinguished Name(s)
OU=Organisational Unit
Pretty much all the attributes can be modified (Name, display name, tel number etc)
run the command with /? for a full list
e.g
  DSMOD USER /?

Commas
Commas must be escaped with the backslash \ character
(other than separators in distinguished names)
e.g.
"CN=Company\, Inc.,CN=Users,DC=ss64,DC=com"

Backslashes
Backslashes used in distinguished names must be escaped with a backslash
(for example,
"CN=Sales\\ Latin America,OU=Distribution Lists,DC=ss64,DC=com").

Redirection
You can pipe results from DSQUERY into DSMOD in order to modify an object.
e.g. To find all users in the Marketing OU (organizational unit) and add them to the Sales group:

DSQUERY user –startnode "ou=Marketing,dc=SS64,dc=com" | DSMOD group "cn=Sales,ou=Marketing,dc=SS64,dc=com" -addmbr 

Spaces
If any value contains spaces, use quotation marks:

   "CN=John Smith,CN=Users,DC=SS64,DC=com"

Special Tokens
The token $username$ (case insensitive) may be used to place the SAM account name.
Entering * as a password will cause DSMOD to prompt for the new password.

For any DS command you can enter multiple values separated by spaces.
e.g. to modify several user accounts at once just supply a list of the distinguished names separated with spaces.

"For a list of all the ways technology has failed to improve the quality of life, press three". - Alice Kahn

Related commands:
dsadd - add object
dsget - display object
dsmove - move object
dsquery - find object
dsrm - delete object
CSVDE - Import or export AD info in CSV format.
LDIFDE - Edit AD Objects, extend schema, import or export AD information.

Equivalent Linux BASH commands:

ldapmodify - Modify Lightweight Directory Access Protocol